Investigators believe they have an identifiable image of a suspect in the Boston Marathon bombings, according to news reports.

A Boston law enforcement source told CNN that investigators believe they have good images from video provided by a Boston television station and a Lord & Taylor department store surveillance camera.

The Boston Globe also reported that an official briefed on the investigation said the image shows a suspect carrying and perhaps dropping a black bag.

A spokeswoman for Boston Mayor Thomas Menino confirmed that the video from Lord & Taylor was helping investigators make “progress.”

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But other media reports were conflicted on how close investigators are to identifying a suspect or suspects. Citing an unnamed senior official, NBC News reported that authorities have “solid leads” on a “number of people” but it is too soon too call any of them suspects, while WCVB TV in Boston said an arrest was “imminent” or had already taken place.

Based on fragments of nylon found at the scene, investigators have previously said that they believe the person or people behind the bombs used heavy bags or backpacks.

The images were described as significant progress in the investigation, which so far has had no clear information on the person or people behind the attack or their potential motive.

FBI investigators had asked the public to send them any photos or videos of the marathon Monday in order to search them for clues to the identity of the bomber.

Lord & Taylor is located at 760 Boylston Street near the site of the second explosion outside the Forum Restaurant.